Proof printing-press.



R. O. VANDERCOOK.

PROOF PRINTING PRESS.

APPLICATION FILED saw. a, 1909.

1,076,084, Patented Oct. 21, 1913.

ROBERT O. VANDEBCOOK, QF CHICAGO, ILLINOIS.

E3005 PRINTING-PRESS.

Specification 6f Letters Patent.

' Application filed September 9, 1909. Serial No. 516,918.

I new and useful Improvements in Proof Printing-Presses, (Case B and I do hereby declare that the following is a full, clear,

and exact description thereof, reference-being had to the-accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to a novel printing press adapted to take proof impression from forms of type, linotypes, electrotypes or other type forms used with printing presses,' and the invention consists of the matters hereinafter described and more specifically pointed out in the appended claims. The invention further relates more par ticularly to the type of proof printing press described in a patentobtained by me on the 29th'dav of.October,1912,No. 1,642,848, and

especially to an improved construction and arrangement of parts by which. the impression member is held down to its work and engagement with the type on the-type-bed, in the advance or worki movementof said impression-member and is lifted from con-- tact wlth the type in its backward or return movement. While the invention, as herein shown and described, is embodied in a proof printing press, it will be apparent as I proceed with my specification that it may be incorporated in a regular automatic printing press.

Other improvements are also included in my invention, as hereinafter set forth.

In the drawings Figure 1 is a partial vertical section through my improved printing press; Fig. 2 is a top plan view of the same; Fig. 3 is a partial vertical section through Fig. 2 on line 33 thereof; Fig. 4 is a detail view in side elevation of the roller carrying yoke; Fig. 5 is a side elevation of a modified form of said roller carrying yoke.

Referring to the drawings; 1 indicates the bed uponwhich is supported the type 2 (see Fig. 3) and over which travels the impression-member 3. press is shown in the drawings, the description of the same will beconfined to and refer to the one side of the prem shown, it being of course understood that the opposite side of the press is identical with the side shown.

The impression-member 3 comprises a seg- As only one side of the mental eylindric shell 4 of relatively large diameter provided at each end with a rocker or support 6. Each rocker is preferably least integral with said shell. The cylindric 5 rim 7 of said rocker or support 6 is turned ;to form a bearing surface which engages I upwardly facing rail 8 formed at the side of the t e-bed 1.

9 in icates a gear secured to the rocker or 1 support 6 and engagesa rack 10 secured to i the type-bed adjacent the rail 8.

g 11 indicates a shaft arranged concentrigcally with the impression-member and rigidly secured thereto. The bed 1 is supported 1 in any convenient manner as, for example, by means of legs (not shown). Mounted upon the end of the shaft 11 is a yoke member 38 consisting of two rigidly connected arms 39*, 39", arranged at an angle to each other, and each of which carries a roller 40 a long hub 39 journaled on the shaft 11 and having both rotatable and endwise movement thereon. The rollers 40 and 41 are each provided with stub shafts 40 and 41, which are journaled by means of suitable bearings, the one, 40 by means of suitable roller hearings in the end of the arm 39, and the other, 41 journaled in .a box 4.1

arm 39". The sliding block 41" is moved or adjusted by means of an adjusting screw 41. Said block 41 is provided with roller bearsings for the stub-shaft 41 of the roller 41. The adjusti screw 41 is threaded through a plate 41 w ich brid es the bifurcation of the arm 39 in which t e block slides.

Arranged at theside of the bed 1 is a bracket 21 which is provided on its inner face with a downwardly facing rail 22, and also with an upwardly facing rail 22",

tal planes and in different vertical planes and being separated vertically. by a dlstance slightly less than the diameter of the rollers 40 and 41. The horizontal planes in whlch said rails are located are both below the level of the axis of the said cylindric 1mpression-member. Said rail 22 is adapted to engage the tops of the rollers 40 and 41 and through them to hold the impressionmember 3 down to its work with the'bearmg surface 7 of the rocker or support 6 in contact with the track 8, and is of sufliclent strength or rigidity to resist the full load in making the impression. At the opposite Patented Oct.21,191-3.

or 41. The yoke member 38 is provided with which is slidably mounted in the end of the g said rails being located in different horizonthe flangesof the roller 42 when the impression-member reaches the opposite ends of its i an operating arm 25.

path and shift the yoke member 38 inward or outward in order to cause the rollers 40,

41 to engage with their tops the downwardly facing rail 22 in the advance or forward movement of the impression-member. and to engage with their bottoms, the upwardly facing rail 22 in the opposite or return movement of the impression member.

The impression-member is provided with g It is also provided with a tympan 26 which has its opposite ends wound about rollers 27, 27, to which are' keyed ratchets 28, 28 adapted to be locked by retaining pawls 29, 29. By means of this construction the tympan may be tightened in its contact with the periphery ofthe impression-member so as to present a smooth surface to the type.

. In this kind of printing press it is essential that the impression-member should be held down to its work with its bearing sur-.

faces in contact .With the rails on the typebed by means of the engagement of the rails Y 22 with the rollers 40 and 41 and by reason of the construction described, the yoke member 38 may be adjusted so as to take up any wear in the rollers. It will be apparent that by means of the screw 41 the roller 41 may be adjusted lengthwise of the arm 39 of said yoke member 38, which will increase the average distance between the centers of the rollers 40, 41 and the center of the shaft 11. j

Instead of the adjustment being made as above described, it may be brought about by means of a construction of a yoke such as illustrated in Fig. 5. In this case the shaft 11 of the impression-member is mounted by means of roller bearings in a block 30 which slides in a slot formed by bifurcations 31, 31, formed in the yoke member 32. The bifurcations are bridged by a plate 33 and the block 30 adjusted in position in the slot by means of a set screw 34. Inthis case the rollers 35, 36 are each journaled in the ends of thearms 32 32 of the yoke member 32. This construction provides an arrangement for moving the impression-member back to its initial position, after it has made the impression, in a path above and removed from contact with the type, generally similar to the construction described in Letters Patent No. 992,461, issued May 16th, 1911, on an application filed by me of even date herewith, in the case of a proof printing press provided with single rollers at the opposite ends of the impression-member.

While ,I have illustrated and described herein certain details of mechanical construction and arrangement, it is to be understood that I do not thereby limit my invention, as it is apparent that they may be modified without departing from the spirit of my invention.

I claim as my invention 1. A printing press comprising a horizontaltype-bed, a rocking, cylindric impression member, supporting rockers on the impression member having curved bearing surfaces concentric with the bearing surface of the impression member, upwardly facing supporting bearing surfaces formed on the bed and adapted to be engaged by the supporting rockers, okes carried at the ends of said impression member, said impression member having rotative connection with the yokes, with its axis of rotation concentric with said rockers, pairs of rollers carried by said yokes, at least one of the rollers of each pair being laterally shiftable relatively to the impression member, downwardly facing rails located in a plane below the level of the axis of the impression member, upwardly facing rails located in a horizontal plane below the level of said downwardly facing rails and in different vertical planes from for shifting the laterally shiftable rollers into position for engagement in alternation with the downwardly and upwardly facing rails at the opposite limits of the movement of said impression member.

2. A printing press comprising a horizontal type-bed, a rocking, cylindric impressionmember, supporting rockers on theimpression-member having curved bearing surfaces concentric with the bearing surface of the impression-member, upwardly facing supporting bear' 'ing surfaces formed on the bed and adapted to be engaged by the supportmg rockers, yokes rotatively carried by said rockers with their axes of rotation coincident with the axes of said rockers, said yokes being movable toward and away from said rockers, pairs of rollers carried by said yokes, a downwardly facing track located in a horizontal plane below the axis of the impression-member and adapted to engage the tops of said rollers in one movement of said impression-member, upwardly-facing tracks located in a horizontal plane below the said upwardly facing tracks and'adapted to en gage the bottoms of said rollers in the opposite movement of said impression-member, and means for automatically movmg said yokes to bring said rollers into engagement with either set of said downwardly and upwardly facing tracks.

3. A printing press comprising a horizontal type-bed, a rocking, cylindric impressionmember, supporting rockers on the impression-member having curved bearing surfaces concentric with the bearing surface of the impression-member, upwardly facing supporting bearing surfaces formed on'the bed and adapted to be engaged by the supporting rockers, yokes rotatively carried by said rockers with their axes of rotation coincident with the axes of said rockers, and said yokes being movable toward and away from said rockers, pairs of rollers carried by said yokes, downwardly facing tracks located in a horizontal plane below the axis of the impression-member and adapted to engage the tops of said rollers in one movement of said impression-member, upwardly facing tracks located in a horizontal plane below the said upwardly facing tracks and adapted to engage thebot-toms of said rollers in the op posite movement of said impression-member, and cams located at the opposite ends of the path of said impression-member adapted to move said yokes to bring said rollers into engagement with either set of said downwardly and upwardly facing tracks.

4. A printing press comprising a horizontal type-bed, a rocking, cylindric impressionmember, supporting rockers formed on the impression member having curved bearing surfaces concentric with the bearing surface of the impression-member, upwardly facing supporting bearing surfaces formed-on the bed and adapted to be engaged by the supporting rockers, yokes provided with hubs,

bearings concentric with said rockers upon which the hubs of said yokes have rotative and endwise movement, pairs of rollers carried by said yokes, downwardly facing rails located in a plane below the axis of the impression-member and adapted to engage the tops of said rollers, upwardly facing tracks located in a plane below the downwardly facing rails and in difiterent vertical planes from those of the downwardly facing rails, and means for shifting said yokes endwise on said bearings at the opposite limits of the movement of said impression-member.

V 5. A printing press comprising a horizontal type-bed, a rocking, cylindric impressionmember, supporting rockers on the impression-member having curved bearing surfaces concentric with the bearing surface of the impression-member, upwardly facing supporting bearing surfaces formed on the bed adapted to be engaged by thesupporting rockers, yokes rotatively carried by said rockers with their axes of rotation coincident wit-h the axes of said rockers, pairs of rollers carried by said yokes. one roller of each pair being adjustable with reference to the axis of the yokes, and downwardly facing rails adapted to engage the tops of said rollers, to hold the said impression-member down to its work.

In testimony that I claim the foregoing as my invention I aflix my si nature in the presence of two witnesses, this 26th day of August A. D. 1909.

ROBERT O. VANDERCOOK.

Witnesses:

G. R. WILKINS, T, H. ALFREDS. 

